The term is used for white-trash rednecks commonly found in run-down neighbourhoods in the Niagara peninsula of Ontario (Fort Erie and Welland in particular).
In general the word is used as an insult for any dim-witted or moronic individual, with some hillbilly overtones.
Doug always loses a wad at the strip joints. He's such an oaskie that he thinks the peelers are interested in more than his money.
12 step recovery jargon referring to someone new who talks about how great life is, now that they'resober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.